sample.multithreading.NetworkDownloadService.java Source code

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Here is the source code for sample.multithreading.NetworkDownloadService.java

Source

package sample.multithreading;

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import org.xmlpull.v1.XmlPullParserException;

import android.app.IntentService;
import android.content.ContentValues;
import android.content.Intent;
import android.os.Process;
import android.support.v4.content.LocalBroadcastManager;
import android.util.Log;

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Locale;
import java.util.Vector;

/**
 * This service is really a generic HTTP downloader. It will pull the content of
 * the passed-in URL and broadcast the state of the world to the application.
 */
public class NetworkDownloadService extends IntentService implements ProgressNotifier {
    public static final String BROADCAST_ACTION = "sample.downloader.PicasaContentDB";
    public static final String EXTRA_LOG = "PS.LOG";
    public static final String EXTRA_STATUS = "PS.EXS";
    public static final String LOG_TAG = "PicasaService";
    public static final int STATE_ACTION_STARTED = 0;
    public static final int STATE_ACTION_CONNECTING = 1;
    public static final int STATE_ACTION_PARSING = 2;
    public static final int STATE_ACTION_WRITING = 3;
    public static final int STATE_ACTION_COMPLETE = 4;
    public static final int STATE_LOG = -1;

    private LocalBroadcastManager mBroadcastManager;

    // a reasonable user-agent string
    public static final String USER_AGENT = "Mozilla/5.0 (Linux; U; Android " + android.os.Build.VERSION.RELEASE
            + ";" + Locale.getDefault().toString() + "; " + android.os.Build.DEVICE + "/" + android.os.Build.ID
            + ")";

    public NetworkDownloadService() {
        super("PicasaFeaturedService");
    }

    @Override
    public void onCreate() {
        mBroadcastManager = LocalBroadcastManager.getInstance(this);
        super.onCreate();
    }

    void broadcastIntentWithState(int paramInt) {
        Intent localIntent = new Intent();
        localIntent.setAction(BROADCAST_ACTION);
        localIntent.putExtra(EXTRA_STATUS, paramInt);
        localIntent.addCategory(Intent.CATEGORY_DEFAULT);
        mBroadcastManager.sendBroadcast(localIntent);
    }

    public void notifyProgress(String paramString) {
        Intent localIntent = new Intent();
        localIntent.setAction(BROADCAST_ACTION);
        localIntent.putExtra(EXTRA_STATUS, -1);
        localIntent.putExtra(EXTRA_LOG, paramString);
        localIntent.addCategory(Intent.CATEGORY_DEFAULT);
        mBroadcastManager.sendBroadcast(localIntent);
    }

    @Override
    protected void onHandleIntent(Intent paramIntent) {
        Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
        String str = paramIntent.getDataString();
        URL localURL;
        try {
            localURL = new URL(str);
            URLConnection localURLConnection = localURL.openConnection();
            if ((localURLConnection instanceof HttpURLConnection)) {
                broadcastIntentWithState(STATE_ACTION_STARTED);
                HttpURLConnection localHttpURLConnection = (HttpURLConnection) localURLConnection;
                localHttpURLConnection.setRequestProperty("User-Agent", USER_AGENT);
                broadcastIntentWithState(STATE_ACTION_CONNECTING);
                localHttpURLConnection.getResponseCode();
                broadcastIntentWithState(STATE_ACTION_PARSING);
                PicasaPullParser localPicasaPullParser = new PicasaPullParser();
                localPicasaPullParser.parseXml(localURLConnection.getInputStream(), this);
                broadcastIntentWithState(STATE_ACTION_WRITING);
                Vector<ContentValues> cvv = localPicasaPullParser.getImages();
                int size = cvv.size();
                ContentValues[] cvArray = new ContentValues[size];
                cvArray = cvv.toArray(cvArray);
                getContentResolver().bulkInsert(PicasaContentDB.getUriByType(this, PicasaContentDB.METADATA_QUERY),
                        cvArray);
                broadcastIntentWithState(STATE_ACTION_COMPLETE);
            }
        } catch (MalformedURLException localMalformedURLException) {
            localMalformedURLException.printStackTrace();
        } catch (IOException localIOException) {
            localIOException.printStackTrace();
        } catch (XmlPullParserException localXmlPullParserException) {
            localXmlPullParserException.printStackTrace();
        }
        Log.d(LOG_TAG, "onHandleIntent Complete");
    }

}